MT46H8M16LFCF-10 IT TR Micron Technology Inc, MT46H8M16LFCF-10 IT TR Datasheet - Page 19

• Manufacturer Part Number: MT46H8M16LFCF-10 IT TR
• Description: IC DDR SDRAM 128MBIT 60VFBGA
• Manufacturer: Micron Technology Inc

Specifications of MT46H8M16LFCF-10 IT TR

• Format - Memory: RAM
• Memory Type: Mobile DDR SDRAM
• Memory Size: 128M (8Mx16)
• Speed: 100MHz
• Interface: Parallel
• Voltage - Supply: 1.7 V ~ 1.9 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 60-VFBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Operations
Bank/row Activation
Figure 7:
PDF: 09005aef8199c1ec/Source: 09005aef81a19319
MT46H8M16LF_1.fm - Rev. K 7/07 EN
Activating a Specific Row in a Specific Bank
Before any READ or WRITE commands can be issued to a bank within the Mobile DDR
SDRAM, a row in that bank must be “opened.” This is accomplished via the ACTIVE
command, which selects both the bank and the row to be activated, as shown in
Figure 7.
After a row is opened with an ACTIVE command, a READ or WRITE command may be
issued to that row, subject to the
the clock period and rounded up to the next whole number to determine the earliest
clock edge after the ACTIVE command on which a READ or WRITE command can be
entered. For example, a
results in 2.7 clocks rounded to 3. This is reflected in Figure 8 on page 20,which covers
any case where 2 <
same procedure is used to convert other specification limits from time units to clock
cycles.)
A subsequent ACTIVE command to a different row in the same bank can only be issued
after the previous active row has been “closed” (precharged). The minimum time
interval between successive ACTIVE commands to the same bank is defined by
A subsequent ACTIVE command to another bank can be issued while the first bank is
being accessed, which results in a reduction of total row-access overhead. The minimum
time interval between successive ACTIVE commands to different banks is defined by
t
BA0, BA1
RRD.
A0–A11
RAS#
CAS#
WE#
CK#
CKE
CS#
CK
HIGH
RA = Row Address
BA = Bank Address
DON’T CARE
BA
RA
t
RCD (MIN)/
t
RCD specification of 20ns with a 133 MHz clock (7.5ns period)
19
t
t
CK ≤ 3. (Figure 8 also shows the same case for
RCD specification.
128Mb: 8 Meg x 16 Mobile DDR SDRAM
Micron Technology, Inc., reserves the right to change products or specifications without notice.
t
RCD (MIN) should be divided by
©2004 Micron Technology, Inc. All rights reserved.
Operations
t
RCD; the
t
RC.